求助翻译

随心

Parthenogenesis involves the initiation of embryonic development: b* L' w* J* ^' f
without a male contribution, and viable pregnancies) |! O0 b: O0 p5 U
from parthenotes are precluded based on abnormalities in imprinted$ T- v- k. [# K
gene expression. Nevertheless, parthenote-derived stem& |+ e! X# l, g- s
cells can contribute to research assessing the importance of  I2 X: m# w2 o2 }4 [3 V* O
imprinting gene expression in early development and to autologous* l! N. f; J- H
cell-based therapy in the female. That some of the epigenetic' ?/ B, J( H4 y& ?
abnormalities in parthenotes can be overcome was evidenced# s3 \1 w1 P5 F- h' ^) d
by the birth of parthenogenetic mice that were
, u7 X: o/ u, l. jthemselves reproductively normal
3 c. C; Q# G0 w哪位高手能给翻译一下，尤其是黄色字，是什么意思呢，看不懂呀
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naturalkillerce

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9 D7 C0 ]  q6 b, l% ]就是说，无精生殖生物都是进行孤雌生殖或者说无精生殖，但是如果与雄性发生交配产生受精卵的话，有可能发生两种情况，一种就是non-viable pregnancy，即虽然怀远但不可能产下活的后代，或者说怀孕时胎儿没有心跳，总之就是受精卵不能正常发育为活的后代，另一种就是viable pregnancy，就是受精后，生理指标正常，没有流产的迹象，有足够理由期待产下活的后代。因为是无精生殖生物都是进行孤雌生殖或者说无精生殖，所以必须有一种措施避免和排除这种受精怀孕，这里就是通过印迹基因表达异常来阻止精生殖生物通过受精怀孕产生活的后代，这样才能保持孤雌生殖或者说无精生殖，不然就不叫无精生殖生物了。